Update README.md

tutorial/README.md

@@ -282,7 +282,7 @@ Imagine implementing a feature for a text editor that allows users to undo their
 
 ### Solving a LeetCode Problem: Largest Rectangle in Histogram
 
-One of the more challenging problems that can be solved using the stack pattern is finding the largest rectangle in a histogram. This involves processing bars in a histogram to find the largest rectangle that can be formed within the bounds of the histogram. The problem definition: Given an array of integers (heights) representing the histogram's bar height where the width of each bar is 1, return the area of the largest rectangle in the histogram. The challenging part is that different bars from the histogram can be combined to represent a larger rectangle as visualized in [this Leetcode problem](https://leetcode.com/problems/largest-rectangle-in-histogram/description/). 
+One of the more challenging problems that can be solved using the stack pattern is finding the largest rectangle in a histogram. This involves processing bars in a histogram to find the largest rectangle that can be formed within the bounds of the histogram. The problem definition: Given an array of integers (heights) representing the histogram's bar height where the width of each bar is 1, return the area of the largest rectangle in the histogram. The challenging part is that different bars from the histogram can be combined to represent a larger rectangle as visualized in [this Leetcode problem](https://leetcode.com/problems/largest-rectangle-in-histogram/description/). Good explanation by [NeetCode](https://www.youtube.com/watch?v=zx5Sw9130L0).
 
 ```python
 def largestRectangleArea(heights):